{"id":900378,"date":"2026-10-04T10:40:54","date_gmt":"2026-10-04T10:40:54","guid":{"rendered":"https:\/\/www.digi4u.co.uk\/blogs\/?page_id=900378"},"modified":"2026-10-04T10:40:54","modified_gmt":"2026-10-04T10:40:54","slug":"screen-grades-testing-warranty","status":"publish","type":"page","link":"https:\/\/www.digi4u.co.uk\/blogs\/screen-grades-testing-warranty\/","title":{"rendered":"Screen Grades &#038; Warranty: Testing Panels Before You Fit Them"},"content":{"rendered":"\n<style>\n.ytk-band{padding:70px 0}\n.ytk-band.ytk-hero{background:linear-gradient(135deg,#06224a 0%,#12508f 62%,#1a6fc4 100%);color:#fff}\n.ytk-band.ytk-soft{background:#F4F7FA}\n.ytk-band.ytk-white{background:#fff}\n.ytk-band.ytk-deep{background:#0F2E52;color:#c2d6e8}\n.ytk-band.ytk-cta{background:linear-gradient(135deg,#0a2a4a 0%,#12508f 100%);color:#fff}\n.ytk-hero-grid{display:grid;gap:34px;grid-template-columns:1fr;align-items:center}\n@media(min-width:900px){.ytk-hero-grid{grid-template-columns:1.12fr 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details:last-child{border-bottom:0}\n.ytk-faq summary{cursor:pointer;list-style:none;padding:20px 56px 20px 24px;font-weight:600;font-size:1.02rem;color:#222;position:relative}\n.ytk-faq summary::-webkit-details-marker{display:none}\n.ytk-faq summary:after{content:\"+\";position:absolute;right:24px;top:16px;color:#1a6fc4;font-weight:700;font-size:1.4rem}\n.ytk-faq details[open] summary:after{content:\"\\2013\"}\n.ytk-faq .ytk-a{padding:0 24px 22px;color:#3B3B3B;font-size:.97rem;margin:0}\n.ytk-cta-inner{max-width:1188px;margin:0 auto;padding:0 24px;text-align:center}\n.ytk-cta h2{color:#fff!important;font-size:clamp(1.5rem,2.4vw,2rem);font-weight:700;margin:0 0 14px}\n.ytk-cta p{color:rgba(255,255,255,.92)!important;max-width:70ch;margin:0 auto 26px}\n.ytk-cta .ytk-btn{color:#06224a!important}\n@media(max-width:600px){.ytk-band{padding:46px 0}.ytk-card{padding:24px 20px}}\n<\/style>\n<div class=\"ytk-band ytk-hero\"><div class=\"ytk-in\">\n<div class=\"ytk-hero-grid\"><div class=\"ytk-hero-copy\">\n<h1 class=\"ytk-h1\">Screen Grades &amp; Warranty<\/h1>\n<div class=\"ytk-verdict\">Test the panel before it is sealed, and grade the quote honestly, because that is where warranty claims come from<\/div>\n<p>This guide covers the part of a screen repair that happens before and after the fitting: what grade you are buying, how to check it, and what your warranty should actually cover.<\/p>\n<div class=\"ytk-checks\">\n  <div>19 articles on grades, testing, IC transfer and warranty<\/div>\n  <div>Written for buyers and for shop policy, not just the bench<\/div>\n  <div>Covers the genuine-display and non-genuine warnings<\/div>\n<\/div>\n<a class=\"ytk-btn\" href=\"#project-review\">Ask about grades and warranty<\/a>\n<\/div>\n<figure class=\"ytk-hero-img\"><img decoding=\"async\" src=\"https:\/\/www.digi4u.co.uk\/blogs\/wp-content\/uploads\/2026\/06\/The-Ultimate-Guide-to-Mobile-Phone-Screen-Quality-Grades-in-the-UK-Repair-Industry-2026.png\" alt=\"Phone screen quality grades explained\" loading=\"eager\" \/><\/figure>\n<\/div>\n<\/div><\/div>\n<div class=\"ytk-band ytk-soft\"><div class=\"ytk-in\">\n<h2 class=\"ytk-h2\">Three routes, and you only need one of them<\/h2>\n<p class=\"ytk-lead\">Take the route that matches the decision in front of you.<\/p>\n<div class=\"ytk-grid ytk-c3\">\n<div class=\"ytk-card\">\n  <div class=\"ytk-num\">01<\/div>\n  <h3>Know the grades<\/h3>\n  <p>Take this route before buying stock or quoting. The words shops use for grades do not mean the same thing across suppliers, and that gap is where margin and complaints both come from.<\/p>\n  <div class=\"ytk-links\">\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/aftermarket-refurbished-or-genuine-phone-screen-what-is-the-difference\/\">Aftermarket, refurbished or genuine: what differs<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/refurbished-phone-parts-uk\/\">What to buy reconditioned and what to buy new<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/how-to-tell-if-an-iphone-screen-is-original\/\">How to tell if an iPhone screen is original<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/pixel-oled-replacement-original-vs-aftermarket-screens\/\">Pixel OLED: original or aftermarket<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/xiaomi-13-screen-replacement-oem-amoled-guide\/\">Xiaomi 13 OEM AMOLED guide<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/uk-mobile-repair-parts-finding-quality-components-within-your-budget\/\">Finding quality parts within a budget<\/a><\/div>\n  <\/div>\n<\/div>\n<div class=\"ytk-card\">\n  <div class=\"ytk-num\">02<\/div>\n  <h3>Test before you seal<\/h3>\n  <p>Take this route at the bench. Almost every screen warranty claim is decided by checks that either happened before the device was closed or did not happen at all.<\/p>\n  <div class=\"ytk-links\">\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/how-to-test-a-replacement-screen\/\">How to test a replacement screen before sealing<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/how-to-check-a-replacement-phone-screen-before-sealing-the-repair\/\">Checking the panel before the repair is sealed<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/120hz-replacement-screens-what-repairers-need-to-verify\/\">What to verify on a 120Hz panel<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/why-replacement-screen-brightness-and-colour-can-look-different\/\">Why brightness and colour can look different<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/why-iphone-replacement-screens-fog-after-installation-how-to-prevent-it-lcd-oled-refurbished-screen-guide\/\">Why screens fog after installation<\/a><\/div>\n  <\/div>\n<\/div>\n<div class=\"ytk-card\">\n  <div class=\"ytk-num\">03<\/div>\n  <h3>Handle warnings and claims<\/h3>\n  <p>Take this route when the device reports a part, or when a customer returns one. Both are policy questions as much as technical ones.<\/p>\n  <div class=\"ytk-links\">\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/how-ic-transfer-technology-solves-the-non-genuine-display-warning\/\">Solving the non-genuine display warning<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/how-to-stop-iphone-11-12-series-genuine-display-warning\/\">Genuine display warnings on iPhone 11\u201313<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/ic-transfer-iphone-screens-no-touch\/\">Why touch can fail after IC transfer<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/battery-ic-chip-transfer-technology-for-iphone-and-ipad-genuine-compatibility-for-uk-repairs\/\">Battery IC transfer for iPhone and iPad<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/replacement-screen-warranty-checks-installation-marks-films-and-testing\/\">Warranty checks: marks, films and testing<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/phone-repair-warranty-uk-shops\/\">Phone repair warranty: what UK shops should cover<\/a><\/div>\n  <\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n<div class=\"ytk-band ytk-white\"><div class=\"ytk-in\">\n<h2 class=\"ytk-h2\">Where warranty claims actually come from<\/h2>\n<p class=\"ytk-lead\">Most claims are not a bad part. They are a grade that was not explained, or a check that was skipped before the device closed.<\/p>\n<div class=\"ytk-grid ytk-c2\">\n<div class=\"ytk-card\">\n  <h3>The grade conversation<\/h3>\n  <p>When a customer is told &quot;a new screen&quot; they expect an original. If the part fitted is an aftermarket or refurbished panel, the difference will be noticed eventually: brightness, colour temperature, touch feel or the absence of features such as True Tone. Explaining the grade in the quote, in the customer&#8217;s language, removes most of the argument before it starts, and it is also what lets you offer two prices honestly rather than one price and a hope.<\/p>\n  <div class=\"ytk-links\">\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/aftermarket-refurbished-or-genuine-phone-screen-what-is-the-difference\/\">Explaining the difference to customers<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/why-replacement-screen-brightness-and-colour-can-look-different\/\">What customers actually notice<\/a><\/div>\n  <\/div>\n<\/div>\n<div class=\"ytk-card\">\n  <h3>The checks that decide the claim<\/h3>\n  <p>A screen tested before it is sealed is a screen you can defend later. Touch across the whole surface, brightness at both ends of the range, proximity and camera behaviour, and a look at the flex for marks all take a few minutes and catch the faults that would otherwise appear a week later. Shops with a low claim rate are not fitting better parts; they are running the same checks every time and recording them.<\/p>\n  <div class=\"ytk-links\">\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/how-to-test-a-replacement-screen\/\">The pre-seal test routine<\/a><\/div>\n    <div><a href=\"https:\/\/www.digi4u.co.uk\/blogs\/replacement-screen-warranty-checks-installation-marks-films-and-testing\/\">What warranty checks look at<\/a><\/div>\n  <\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n<div class=\"ytk-band ytk-deep\"><div class=\"ytk-in\">\n<h2 class=\"ytk-h2\">What actually decides a warranty claim \u2014 four things<\/h2>\n<p class=\"ytk-lead\">Four variables, and only the last one is really about the part.<\/p>\n<div class=\"ytk-causes\">\n<div>\n  <div class=\"ytk-dot\">01<\/div>\n  <h3>What the customer was told<\/h3>\n  <p>A grade explained in the quote prevents most disputes. &quot;A new screen&quot; means genuine to a customer, whatever it means on the trade list.<\/p>\n<\/div>\n<div>\n  <div class=\"ytk-dot\">02<\/div>\n  <h3>What was checked before sealing<\/h3>\n  <p>Touch, brightness, proximity and flex marks. These are the checks that decide whether a fault is visible now or after collection.<\/p>\n<\/div>\n<div>\n  <div class=\"ytk-dot\">03<\/div>\n  <h3>Pairing and transfer work<\/h3>\n  <p>IC transfer and genuine-display warnings are part of the repair where they apply, and doing them badly creates a fault of the shop&#8217;s own making.<\/p>\n<\/div>\n<div>\n  <div class=\"ytk-dot\">04<\/div>\n  <h3>Supplier consistency<\/h3>\n  <p>The same grade name from two suppliers is not the same part. Batch consistency is what makes a warranty policy affordable rather than painful.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n<div class=\"ytk-band ytk-soft\"><div class=\"ytk-in\">\n<h2 class=\"ytk-h2\">Where to go from here<\/h2>\n<p class=\"ytk-lead\">Grading connects the buying decision to the fitting work.<\/p>\n<div class=\"ytk-grid ytk-c4\">\n<a class=\"ytk-guide\" href=\"https:\/\/www.digi4u.co.uk\/blogs\/iphone-screen-quality\/\">\n  <div class=\"ytk-gt\">iPhone Screen Quality<\/div>\n  <p class=\"ytk-gp\">Panel types and what each grade means.<\/p>\n  <span class=\"ytk-arrow\">&#8594;<\/span>\n<\/a>\n<a class=\"ytk-guide\" href=\"https:\/\/www.digi4u.co.uk\/blogs\/wholesale-parts-stock-buying\/\">\n  <div class=\"ytk-gt\">Wholesale &amp; Stock Buying<\/div>\n  <p class=\"ytk-gp\">How to buy panels and stock them sensibly.<\/p>\n  <span class=\"ytk-arrow\">&#8594;<\/span>\n<\/a>\n<a class=\"ytk-guide\" href=\"https:\/\/www.digi4u.co.uk\/blogs\/samsung-android-phone-repairs\/\">\n  <div class=\"ytk-gt\">Samsung &amp; Android Repairs<\/div>\n  <p class=\"ytk-gp\">Where grades vary most between brands.<\/p>\n  <span class=\"ytk-arrow\">&#8594;<\/span>\n<\/a>\n<a class=\"ytk-guide\" href=\"https:\/\/www.digi4u.co.uk\/blogs\/repair-shop-business-and-market\/\">\n  <div class=\"ytk-gt\">Repair Shop Business<\/div>\n  <p class=\"ytk-gp\">Turning warranty policy into a price you can defend.<\/p>\n  <span class=\"ytk-arrow\">&#8594;<\/span>\n<\/a>\n<\/div>\n<\/div><\/div>\n<div class=\"ytk-band ytk-white\"><div class=\"ytk-in\">\n<h2 class=\"ytk-h2\">Grades and warranty questions<\/h2>\n<p class=\"ytk-lead\">The short answers, each linked to the article set behind it.<\/p>\n<div class=\"ytk-faq\">\n  <details>\n    <summary>What is the difference between genuine, refurbished and aftermarket?<\/summary><p class=\"ytk-a\">Genuine is the original manufacturer&#8217;s part. Refurbished usually means original glass or an original panel reworked with a new touch layer or frame. Aftermarket is produced by a third party, and the quality range inside that category is wide, which is why supplier consistency matters more than the label.<\/p>\n  <\/details>\n  <details>\n    <summary>How long should a repair shop warranty a screen?<\/summary><p class=\"ytk-a\">Long enough to cover the installation, not the accident. Most UK shops cover the workmanship and the panel for a defined period, excluding new physical damage, water ingress and customer-caused faults. Writing the exclusions into the invoice is what makes the policy enforceable.<\/p>\n  <\/details>\n  <details>\n    <summary>Can I test a screen without fitting it?<\/summary><p class=\"ytk-a\">Partially. You can connect the panel and test touch, display, brightness and proximity before the adhesive goes on, which catches the majority of faulty parts. What you cannot fully test is how it behaves once sealed and warm, which is why the pre-seal check is a filter rather than a guarantee.<\/p>\n  <\/details>\n  <details>\n    <summary>What causes the non-genuine display warning?<\/summary><p class=\"ytk-a\">The device cannot verify the panel against the calibration held for that logic board. Transferring the IC from the original screen, or fitting a diagnostic part, is how shops avoid the warning, and the transfer work has to be done well or touch and brightness can suffer.<\/p>\n  <\/details>\n  <details>\n    <summary>Should I fit a cheaper grade if the customer insists?<\/summary><p class=\"ytk-a\">Yes, as long as the quote names the grade and the customer accepts it in writing. The problems start when a cheaper part is fitted at a premium price, because then the dispute is about honesty rather than about the part.<\/p>\n  <\/details>\n<\/div>\n<\/div><\/div>\n<div class=\"ytk-band ytk-cta\" id=\"project-review\"><div class=\"ytk-cta-inner\">\n<h2>Ask for the grade list and warranty terms<\/h2>\n<p>Tell us the models you fit most and the grades you want to standardise on. You will get the grade options with trade pricing, plus a short warranty position you can reuse in your own invoices.<\/p>\n<a class=\"ytk-btn\" href=\"https:\/\/www.digi4u.co.uk\/index.php?route=information\/contact\">Ask about grades and warranty<\/a>\n<\/div><\/div>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"Article\",\"headline\":\"Screen Grades & Warranty: Testing Panels Before You Fit Them\",\"description\":\"Phone screen grades explained for UK repair shops: aftermarket, refurbished and genuine panels, how to test before sealing, IC transfer, brightness checks and warranty policy.\",\"about\":\"Screen Grades & Warranty\",\"publisher\":{\"@type\":\"Organization\",\"name\":\"Shenzhen Yoctek Co., LTD.\"},\"mainEntityOfPage\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.digi4u.co.uk\/blogs\/screen-grades-testing-warranty\/\"}}<\/script>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the difference between genuine, refurbished and aftermarket?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Genuine is the original manufacturer's part. Refurbished usually means original glass or an original panel reworked with a new touch layer or frame. Aftermarket is produced by a third party, and the quality range inside that category is wide, which is why supplier consistency matters more than the label.\"}},{\"@type\":\"Question\",\"name\":\"How long should a repair shop warranty a screen?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Long enough to cover the installation, not the accident. Most UK shops cover the workmanship and the panel for a defined period, excluding new physical damage, water ingress and customer-caused faults. Writing the exclusions into the invoice is what makes the policy enforceable.\"}},{\"@type\":\"Question\",\"name\":\"Can I test a screen without fitting it?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Partially. You can connect the panel and test touch, display, brightness and proximity before the adhesive goes on, which catches the majority of faulty parts. 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The problems start when a cheaper part is fitted at a premium price, because then the dispute is about honesty rather than about the part.\"}}]}<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Screen Grades &amp; Warranty Test the panel before it is sealed, and grade the quote honestly, because that is where [&hellip;]<\/p>\n","protected":false},"author":101015,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"two_page_speed":[],"footnotes":""},"class_list":["post-900378","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Screen Grades &amp; 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